AEM Developer Certification Series: Sling Model Exporter | AEM Community Blog Seeding

[#1]

AEM Developer Certification Series: Sling Model Exporter by Monendra Singh

Abstract

Introduction: Apache Sling Models 1.3.0 introduces Sling Model Exporter, an elegant way to export or serialize Sling Model objects into custom abstractions. This article just exposes the traditional use-case of using Sling Models to populate HTL scripts, with leveraging the Sling Model Exporter framework to serialize a Sling Model into JSON.

Certification Exam Question Practice:
A developer wants to consume AEM Page Data in Single Page Application. The Single Page Application is coded to understand JSON format. Only page content should be exposed through JSON. All the existing components are based on foundation components. Which change should the developer make in the existing components to support this requirement?

A. Add JSON as the default extension in Apache Sling Servlet?Script Resolver and Error handler Configuration

B. Implement a Sling Model Exporter for the components

C. Create a custom sling event handler to handle JSON requests

D. Invoke the page URL with the extension .json to get the values to construct the required output

Solution Explanation:
The correct answer is B. Implement a Sling Model Exporter for the components.

A Sling Model Exporter is a component that can be used to export Sling Models to a variety of formats, including JSON. To implement a Sling Model Exporter, the developer would need to create a class that implements the SlingModelExporter interface. The SlingModelExporter interface defines a single method, exportModel, which takes a Sling Model as input and returns a representation of the model in the desired format.

In this case, the developer would need to create a Sling Model Exporter that exports the page content to JSON. The exportModel method would need to iterate over the page content and convert each item to a JSON object. The JSON objects would then be returned as a JSON array.

Once the Sling Model Exporter has been implemented, it can be registered with AEM. To do this, the developer would need to add a configuration property to the cq:config element of the component. The configuration property would need to specify the name of the Sling Model Exporter class.

Once the Sling Model Exporter has been registered, it can be used to export the page content to JSON. To do this, the developer would need to call the exportModel method on the Sling Model Exporter. The exportModel method would return a JSON representation of the page content.

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AEM Developer Certification Series: Sling Model Exporter

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[#2]

Nice read.